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| author | Jan Kara <jack@suse.cz> | 2013-11-12 15:11:19 -0800 |
|---|---|---|
| committer | Chanho Park <chanho61.park@samsung.com> | 2014-03-20 17:44:44 +0900 |
| commit | 6a139b83f6e16924e3a8d612335411f38e901823 (patch) | |
| tree | b29bfa241a78b24fdaab0fb9017d8f9362f64dd3 /drivers/misc/modem_if | |
| parent | 67d807339379a050b370c888a0d883eafd482ec8 (diff) | |
| download | linux-3.10-6a139b83f6e16924e3a8d612335411f38e901823.tar.gz linux-3.10-6a139b83f6e16924e3a8d612335411f38e901823.tar.bz2 linux-3.10-6a139b83f6e16924e3a8d612335411f38e901823.zip | |
rbtree: fix rbtree_postorder_for_each_entry_safe() iterator
The iterator rbtree_postorder_for_each_entry_safe() relies on pointer
underflow behavior when testing for loop termination. In particular it
expects that
&rb_entry(NULL, type, field)->field
is NULL. But the result of this expression is not defined by a C standard
and some gcc versions (e.g. 4.3.4) assume the above expression can never
be equal to NULL. The net result is an oops because the iteration is not
properly terminated.
Fix the problem by modifying the iterator to avoid pointer underflows.
Change-Id: I06d5983b5335412be6cb6ebd95db3c682e26ed38
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com>
Cc: Michel Lespinasse <walken@google.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Artem Bityutskiy <dedekind1@gmail.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Cc: Pablo Neira Ayuso <pablo@netfilter.org>
Cc: Patrick McHardy <kaber@trash.net>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Theodore Ts'o <tytso@mit.edu>
Cc: <stable@vger.kernel.org> [3.12.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/misc/modem_if')
0 files changed, 0 insertions, 0 deletions